Whenever the designated crisis responder petitions for detention of a person whose actions constitute a likelihood of serious harm, or who is gravely disabled, the facility providing one hundred twenty hour evaluation and treatment must immediately accept on a provisional basis the petition and the person. The facility shall then evaluate the person's condition and admit, detain, transfer, or discharge such person in accordance with RCW
71.05.210. The facility shall notify in writing the court and the designated crisis responder of the date and time of the initial detention of each person involuntarily detained in order that a probable cause hearing shall be held no later than one hundred twenty hours after detention.